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LoadKey.c
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LoadKey.c
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/*
* Copyright (C) 2017 Sam88651.
*
* Module Name:
* LoadKey.c
* Abstract:
* Load and parse JSON HASP key description.
* Notes:
* Revision History:
*/
#include <unistd.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <wchar.h>
#include <sys/stat.h>
#include <string.h>
#include <libusb_vhci.h>
#include <jansson.h>
#include <syslog.h>
#include "USBKeyEmu.h"
#define min(a,b) ((a)<(b)?(a):(b))
/**
* Load and parse JSON file
*
* @param text - JSON text
* @return - JSON as a structure or NULL in case of error
*/
static json_t *LoadJson(const uint8_t *text) {
json_t *root;
json_error_t error;
root = json_loads(text, 0, &error);
if (root) {
return root;
} else {
return (json_t *)NULL;
}
}
/**
* Get value of hex-encoded JSON key
* @param jval - key
* @return - value
*/
static unsigned long GetLongHexValue (json_t *jval) {
char *ptr;
unsigned long val = 0;
if ( jval != NULL ) {
val = strtoul(json_string_value(jval), &ptr, 16);
}
return val;
}
/**
* String to upper. Works only with ASCII
* @param str - string
* @return - upper string
*/
static char *StrUpr (char *str) {
for ( char *pval = str; *pval; pval++ ) {
*pval = toupper(*pval);
}
return str;
}
/**
* Count hex-encoded values in string
* @param str - hex-encoded values string
* @return - number of values
*/
static int GetHexByteArraySize (char *str) {
int count = 0;
for ( char *pval = str; *pval; ) {
if ( !strncmp(pval,"0X",2) ) { // hex-value prefix
for ( ; *pval && *pval != ','; pval++ );// skip to the end of line or comma
++count;
} else {
++pval;
}
}
return count;
}
/**
* Get hex-encoded values as an array of values
*
* @param val - resulting array
* @param count - bytes count
* @param sval - hex-encoded values string
* @return - parsed bytes count
*/
static int GetHexBytesString (uint8_t *val, int count, char *sval) {
int n;
char *ptr;
unsigned long lval;
for ( n = 0; *sval && n < count; ) {
if ( !strncmp(sval,"0X",2) ) { // hex-value prefix
lval = strtol(sval, &ptr, 16); // next byte
val [n] = (uint8_t)lval;
for ( ; *sval && *sval != ','; sval++ );// skip to EOL or comma
++n;
} else {
++sval;
}
}
return n;
}
/**
* Get JSON key value as array of bytes
*
* @param jval - key
* @return - array with its length
*/
static PBYTE_ARRAY GetHexByteArray (json_t *jval) {
PBYTE_ARRAY val = NULL;
char *sval;
int count, n;
size_t i;
val = malloc(sizeof(BYTE_ARRAY));
val->size = 0;
val->bytes = NULL;
if ( jval != NULL && val != NULL ) { // skip empty values
if ( jval->type == JSON_STRING ) { // JSON key value is a string
count = 0;
sval = StrUpr((char *)json_string_value(jval));
count = GetHexByteArraySize(sval);
if ( count > 0 ) {
val->bytes = malloc(count*sizeof(uint8_t));
if ( val->bytes != NULL ) {
val->size = count;
GetHexBytesString ( val->bytes, count, sval );
}
}
} else if ( jval->type == JSON_ARRAY ) {// value can be multi-string
size_t size = json_array_size(jval);// count strings
count = 0;
for ( i = 0; i < size; i++) { // walk on strings
json_t *item = json_array_get(jval, i);
if ( item != NULL ) {
sval = StrUpr((char *)json_string_value(item));
n = GetHexByteArraySize(sval);
count += n;
}
}
if ( count > 0 ) { // prepare result
val->bytes = malloc(count*sizeof(uint8_t));
if ( val->bytes != NULL ) {
val->size = count;
for ( n = 0, i = 0; i < size; i++) {
json_t *item = json_array_get(jval, i);
sval = (char *)json_string_value(item);
if ( item != NULL ) {
n += GetHexBytesString ( val->bytes+n, count-n, sval );
}
}
}
}
}
}
return val;
}
/**
* "Classified" vectors table for old HASPs SecTable
*/
#define HASP_ROWS 8
#define HASP_COLS 8
static uint8_t HASP_rows [HASP_ROWS] [HASP_COLS] = {
{ 0, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 1, 0, 1, 0, 1, 0, 1 },
{ 1, 0, 1, 0, 1, 0, 1, 0 },
{ 0, 0, 1, 1, 0, 0, 1, 1 },
{ 1, 1, 0, 0, 1, 1, 0, 0 },
{ 0, 0, 0, 0, 1, 1, 1, 1 },
{ 1, 1, 1, 1, 0, 0, 0, 0 },
{ 1, 1, 1, 1, 1, 1, 1, 1 }
};
#ifdef DEBUG
/**
*
* @param p
* @param size
*/
static void dumpArray(uint8_t *p, int size) {
for ( int ii = 0; ii < size; ii++) {
if ( ii%16 == 0 && ii )
syslog (LOG_DEBUG, "\n");
syslog (LOG_DEBUG, "0x%02hx, ", p[ii]);
}
syslog (LOG_DEBUG, "\n");
}
#endif
/**
* Build standard SecTable
*
* @param pKeyData
*/
static void BuildStandardSecTable (PKEYDATA pKeyData) {
uint32_t i, j;
uint8_t alBuf[8];
unsigned long password = pKeyData->password;
password ^= 0x09071966;
for ( i = 0; i < sizeof(alBuf); i++ ) {
alBuf [i] = (uint8_t)(password & 7);
password = password >> 3;
}
memset(pKeyData->secTable, 0, sizeof(pKeyData->secTable));
for ( i = 0; i < HASP_ROWS; i++) {
for ( j = 0; j < HASP_COLS; j++ ) {
pKeyData->secTable[j] |= HASP_rows[alBuf[i]][j] << (7 - i);
}
}
}
/**
* Load HASP key description into memory from file.
*
* @param file - filename
* @param pKeyData - memory structure, key description
* @return - 0 in case of success or error code. Positive values - standard runtime errno codes.
* Negative values - file processing/parsing errors.
*/
int LoadKey (char file[], PKEYDATA pKeyData) {
FILE *fp;
char *js = NULL;
size_t jslen;
struct stat st;
int result = 0;
stat(file, &st);
jslen = st.st_size;
js = malloc (jslen+1);
if ( js != NULL ) {
if ( (fp=fopen(file,"r")) != NULL ) {
jslen = fread (js, sizeof(uint8_t), jslen, fp);
fclose (fp);
if ( jslen > 0 ) {
js [jslen] = '\0';
json_t *root = LoadJson (js);// Parse JSON
if ( root != NULL ) { // check for HASP description
json_t *key = json_object_get (root,"HASP Key");
if ( key != NULL ) { // get keys
json_t *jname = json_object_get (key,"Name");
if ( jname ) {
char *sval = (char *)json_string_value(jname);
int l = min(sizeof(pKeyData->name)-1,strlen(sval));
strncpy (pKeyData->name, sval, l);
pKeyData->name [l] = '\0';
} else {
strncpy (pKeyData->name, "None", sizeof(pKeyData->name));
}
json_t *jcreated = json_object_get (key,"Created");
if ( jcreated ) {
char *sval = (char *)json_string_value(jcreated);
int l = min(sizeof(pKeyData->created)-1,strlen(sval));
strncpy (pKeyData->created, sval, l);
pKeyData->created [l] = '\0';
} else {
strncpy (pKeyData->created, "Not set", sizeof(pKeyData->created));
}
json_t *jpassword = json_object_get (key,"Password");
unsigned long password = GetLongHexValue(jpassword);
pKeyData->password = (password >> 16) | (password << 16);
json_t *jkeyType = json_object_get (key,"Type");
unsigned long keyType = GetLongHexValue (jkeyType);
pKeyData->keyType = (uint8_t)keyType;
json_t *jmemoryType = json_object_get (key,"Memory");
unsigned long memoryType = GetLongHexValue (jmemoryType);
pKeyData->memoryType = (uint8_t)memoryType;
json_t *jsn = json_object_get (key,"SN");
unsigned long sn = GetLongHexValue (jsn);
json_t *joption = json_object_get (key,"Option");
PBYTE_ARRAY option = GetHexByteArray (joption);
memcpy(pKeyData->options,option->bytes,min(option->size,sizeof(pKeyData->options)));
json_t *jsecTable = json_object_get (key,"SecTable");
PBYTE_ARRAY secTable = GetHexByteArray (jsecTable);
memcpy(pKeyData->secTable,secTable->bytes,min(secTable->size,sizeof(pKeyData->secTable)));
if ( !(joption != NULL && jsecTable != NULL && pKeyData->options[0]==1) ||
!(joption == NULL && jsecTable != NULL) ) { // Universal ST case
BuildStandardSecTable (pKeyData);
}
json_t *jnetMemory = json_object_get(key,"NetMemory");
PBYTE_ARRAY netMemory = GetHexByteArray (jnetMemory);
memcpy(&pKeyData->netMemory[0],&sn,sizeof(sn));
memcpy(&pKeyData->netMemory[4],netMemory->bytes,min(netMemory->size,sizeof(pKeyData->netMemory)-4));
if ( jnetMemory == NULL ) {
memset(&pKeyData->netMemory[4], sizeof(pKeyData->netMemory)-4, 0xFF);
if ( pKeyData->memoryType==4 ) { // Unlimited Net key
pKeyData->netMemory [6+4] = 0xFF;
pKeyData->netMemory [7+4] = 0xFF;
pKeyData->netMemory [10+4] = 0xFE;
} else { // Local key
pKeyData->netMemory [6+4] = 0;
pKeyData->netMemory [7+4] = 0;
pKeyData->netMemory [10+4] = 0;
}
}
json_t *jmemory = json_object_get(key,"Data");
PBYTE_ARRAY memory = GetHexByteArray (jmemory);
memcpy(pKeyData->memory,memory->bytes,min(memory->size,sizeof(pKeyData->memory)));
json_t *jedStruct = json_object_get(key,"EDStruct");
PBYTE_ARRAY edStruct = GetHexByteArray (jedStruct);
memcpy(pKeyData->edStruct,edStruct->bytes,min(edStruct->size,sizeof(pKeyData->memory)));
#ifdef DEBUG
syslog (LOG_DEBUG, "Password 0x%x\n", pKeyData->password);
syslog (LOG_DEBUG, "keyType 0x%hhx\n", pKeyData->keyType);
syslog (LOG_DEBUG, "MemoryType 0x%hhx\n", pKeyData->memoryType);
syslog (LOG_DEBUG, "Option %d bytes\n", option->size);
dumpArray(pKeyData->options,sizeof(pKeyData->options));
syslog (LOG_DEBUG, "NetMemory %d bytes\n", netMemory->size);
dumpArray(pKeyData->netMemory,sizeof(pKeyData->netMemory));
syslog (LOG_DEBUG, "SecTable %d bytes\n", secTable->size);
dumpArray(pKeyData->secTable,sizeof(pKeyData->secTable));
syslog (LOG_DEBUG, "Data %d bytes\n", memory->size);
dumpArray(pKeyData->memory,sizeof(pKeyData->memory));
syslog (LOG_DEBUG, "EDStruct %d bytes\n", edStruct->size);
dumpArray(pKeyData->edStruct,sizeof(pKeyData->edStruct));
#endif
json_decref(root);
} else {
result = -1;
}
} else {
result = -1;
}
} else {
result = -1;
}
} else {
result = errno;
}
free (js);
} else {
result = errno;
}
return result;
}